| Roger Federer,38,born in Basel,Switzerland,is one of the most representative players in the history of tennis.So far,Roger Federer remains the top player in the world’s singles weeks.In 2001,19-year-old Federer won his first title in his career at Milan,and at the age of 37,he achieved 100 titles in his life.Since 2015,Federer has won the 88 th singles champion in his career.He is suffering from injury and his performance has plummeted.When Federer’s competitive state is questioned,a generation of tennis King won the Australian Open Singles Championship in 2017 and 2018,which indicates the return of the king.According to the survey,Federer won two Grand Slam titles and two second places in 2015-2018 hard court tennis.ATP event 10 singles champion record.This paper uses scientific research methods such as literature,video observation,mathematical statistics and logical analysis to analyze the use of technology and tactics of Federer in 2015-2018 four Grand Slam hard ground events,find out the advantages and disadvantages of Federer in hard ground events,and analyze the reasons for the change of competitive performance,so as to explore the realization of a generation of tennis king after experiencing injuries and injuries The characteristics of technical and tactical changes behind the state return provide theoretical guidance for the recovery and development of the world’s High-level Men’s tennis players,and provide reference for the training of domestic men’s professional tennis players.Through the analysis,it is found that Federer’s skills and tactics in the four seasons of2015-2018 are mainly characterized by the following features:(1)In the serve stage,Federer pursued a higher ACE score directly in the four seasons,and averaged more than 10 ACE balls per game per year.The overall tactics adopted by Federer during the serve stage in the flat division is to focus on speed Attacking opponents with strong,rotating,and landing points guarantees a 60% scoring rate.The purpose is to use the pre-emptive service to achieve oppression of the opponent,while the second serve increases the change in a stable state.,Increase the difficulty of predicting opponents.Federer’s four seasons as a whole showed a high utilization rate of outside corners.This tactic can achieve a large angle to move the opponent out of neutral,creating a better opportunity for the third shot offense.The use rate of the second-corner chase has increased year by year,holding opponents in a passive state,effectively weakening the opponent’s threat of receiving serve,and realizing active scoring with the help of a strong forehand.(2)In the receiving stage,Federer has a strong receiving ability,maintaining an average receiving success rate of 40.35% per game in the four seasons.Federer has powerful forehands and sideways forehands in the use of receiver technology,but opponents serve more often to choose their backhand position.The highest utilization rate of backhand draws is also related to Federer’s one-handed backhand technique in the face of a strong spin,and the weak point of passive reception is suppressed by the opponent.However,Federer has a good ability and consciousness of receiving the ball.A passive receiver will mobilize opponents on the line by pushing or cutting.In the face of a weak second serve,the use of pumping technology can often improve the turn defense and create scoring opportunities.On the return line,the return ball in the flat zone is mainly the return line,and there are changes in the return line of the slash,which reflects the diversified tactical intentions.The average return line of more than 40% of the preemptive zone uses slash transfers to increase the return return depth.The fourth shot hits the ball in a way that maintains a balance between straight and oblique lines,and combines deeper return points to achieve an active score in the fourth shot or create an advantage for the stalemate stage.The changes in the four seasons on the return point of the first serve are more obvious.The return to the middle line of the corner kick has been greatly improved in the 2017 season.The treatment of the inner corner has changed the most.The season showed an explosive growth trend and then declined year by year.The four seasons in the middle of the penalties showed a year-on-year upward trend.The highest was the 2017 season and the lowest was the 2015 season.Federer ’s second-round return and hard-point return in hard court matches are significantly different.Except for the 2017 season,the overall back-field corner selection is slightly higher than the mid-field back-field drop point,the highest.It is the 2016 season.In terms of receiving corner kicks,the first three seasons mainly focused on returning to the middle point.In the 2018 season,major adjustments were made.The return corner points after receiving corners has tripled;(3)Forehand and backhand draws are the main techniques used in the four seasons of the stalemate phase.The combined use of both techniques has exceeded 80%.Among them,the most frequent use of forehand draws is three seasons.The usage rates are all over 40%.The frequency of backhand draws has also been around 40% in all four seasons.Secondly,Federer’s pre-net interception technique is also used more frequently,and it has shown a clear year-on-year upward trend in the past four seasons.Cause opponents to make mistakes to achieve points.In terms of return points,the number of shots against each other increased.The area four has significantly improved in the 2018 season.The frequency of use in the 2018 season is twice that of the 2015 season,which reflects Federer’s tactical intention of strengthening his offensive consciousness and wanting to make quick decisions.There was a decrease in the choice of the drop point in Region 2.The 2017 season or even the entire season was not selected and used.Although the usage frequency of Area 7 in the four seasons has shown a downward trend,the overall usage rate is still high.Federer’s aggressive offensive tactics during the stalemate phase.In the choice of the return line,it is more to choose the opponent’s backhand position to oppress the opponent.,Forcing opponents to make mistakes to achieve a winning effect. |
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